Thread-cutting attachment.



C. M. BLACK.

THREAD CUTTING ATTACHMENT. APPLICATION FILED MAR. 29. 1916.

1 ,1 99,659 .7 Patented Sept. 26, 1916.

wilhwooao I as co. puomumon wasnmcmu. n. c

t nrrnn snares earner oration COBA MARY BLACK, oreonivs'rown, PENNSYLVANIA.

ineaeae.

clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved thread cutting attachment, more especially designed for use in connection and combi-' nation with a spool, which is designed to hold the cotton, silk, or other thread, thereby affording an improved device for advantageous use in the household, dressmakingestablishments, tailor shops, shoemakers, and shoe repairs establishments, and in similar places.

Another object of the invention is to provide a thread cutter having a screw threaded shank designed to thread into one end of the spool, and in such wise, that when the thread is not being used, its end portion may be clamped between the thread cutter and the end surface of the spool, thereby preventing the thread from unwinding from the spool.

Another object of the invention is the provision of a thread cutter attachment, which may be adjusted, and used as a clamping device, to hold the spool immovable upon the spindle of a sewing machine, thereby preventing the thread from unwinding, when the machine is not in use, and in case the spool is accidentally moved rotatably.

' In practical fields the details of construc tion may necessitate alterations, falling within the scope of what is claimed.

The invention comprises further features and combination of parts, as hereinafter set forth, shown in the drawings and claimed.

In the drawings: Figure 1 is a view in perspective of a spool of thread, showing the thread cutting attachment as applied to one end thereof. Fig. 2 is a view in side elevation of a spool of thread showing the thread cutting attachment in edge view, and illustrating the end of the thread of the spool clamped between the surface of one end of the spool and the lower edge of the thread cutting attachment plate. Fig. 3

- is'a view in side elevation of a spool of THREAD-CUTTING ATTACHMENT.

Specification of Letters Patent. Patentgd Sept, :26, 1 916 Application filed March 29, 1916. Serial No. 87,514.

threadon" a spindle ofa sewing machine, illustrating the thread cutting attachment plate u'sedas a friction clamp to engage the spindle to hold the spool against displacement on the spindle, to prevent the thread becoming unwound when the machine is not being used.- Fig. lisa plan view of Fig. 3. Fig. 5 is a detail perspective view of the thread cutting attachment detached.

Referring more especially to the drawings, 1 designates the thread cutting attachment as a whole, which comprises a plate 2, which is constructed from a thin piece of steel. This plate is provided with a V- shaped recess 3, the opposite angularly disposed edge portion of which and the crotch 3 are provided with opposing bevels 4c and 5, thereby forming the cutting edge 6, to be engaged by the thread for severing the same, that is, after the required lengthof thread has been unwound from the spool. The lower edge of the plate is formed with an integral tapering threaded shank 7, and the object of the invention, is that the dressmaker, tailor or shoemaker and similar workers are to be provided with one or more of these devices or cutters, and when a new spool of thread 8 is to be used, the thread cutting attachment is applied to one end of the spool, thereby affording a thread cutter attachment, which is always ready and convenient for use. In other words the tapering threaded shank 7 is threaded into one end of thespool, as shown clearly in Figs. 1 and 2, and when the thread is not being used, the end portion of the thread is inserted between the lower edge of the plate of the thread cutter and the face of one end of the spool, as shown at 9 in Fig. 1, thereby preventing the thread from unwinding. Moreover, the threaded shank 7 is so threaded into the spool, so that one of its beveled edges 10 may engage the spindle 11 of a sewing machine head, to frictionally clamp the spool of thread against revoluble movement, when the thread is not desired for use. One end of the lower edge 12 of the thread cutting plate is beveled as shown at 13, so that in case 'the thread on the spool is comparatively thin, the end of the thread may be wedged between the bevel 13 and the end surface of the spool. If desired, both end portions of the end edge 12 may be beveled. However, if the thread on the spool is considerably thick, the thread out ting plate may be rotated slightly, so that the thicker thread may be inserted between the end edge 12 and the surface of the end of the spool.

The invention having been set forth, what is claimed as new and useful is:

A thread cutting attachment for spools, comprising a substantially flat plate extending edgewise from one end of the spool and having a V-shaped recess, the edges of which being provided with a cutting edge, said plate having a tapered threaded shank integral with one edge thereof designed to thread into the spool to holdthe plate edgewise from one end of the spool, the vertical edge portions of the plate being beveled, whereby one or the other of said bevels may engage the spindle of a sewing machine, to prevent the spool from turning and the thread unwinding.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CORA MARY BLACK.

WVitnesses J. P. WILLIAMS, C. HAHN.

Copies of this patent may be obtained for live cents each, by addressing the Commissioner of Patents.

' Washington, D. C. 

